Method for extending pipe lines under pressure



May 24, 1938.- DUTCH 2,118,376

METHOD FOR EXTENDING PIPE LINES UNDER PRESSURE Filed March 16, 1935 53EMERY DUTCH INVENTOR.

' FIG.5

/; ATTORNEYS.

Patented May 24, 1938 PATENT oFFicE METHOD FOR EXTENDING PIIE LINESUNDER PRESSURE Emery Dutch, Bronx, N. Y.

Application March 16, 1935, Serial No. 11,433

1 Claim.

This invention relates to a method for extending pipe lines underpressure without the necessity of shutting them off and withoutsubstantial loss of pressure or fluid.

The main object of my invention is to provide a method for accomplishingthe operation characterized hereinbefore in a simpler, less expensiveand more efiicient manner than has been done heretofore.

In the drawing accompanying this specification and forming a partthereof:

Fig. 1 is a side elevation of the end of an existing pipe line, usuallycalled the "dead end, and being sealed, as indicated in the drawing, bywelding a disk or cap on the termination thereof;

Fig. 2 is a pipe member, preferably in the form of a T, adapted to besecured on the dead end shown in Fig. l, and to be used during thepractise of my invention, as will appear as. this specificationproceeds;

Fig. 3 is a closing or sealing plug which may be used to seal the upperend of the T shown in Fig. 2;

Fig. 4 is an elevational assembly, parts of the same being broken away,showing the assembling of the parts hereinbefore described and adrilling machine used in the practise of my invention;

Fig. 5 is a sectional elevation showing a form of the extension executedaccording to my invention.

Referring now to the drawing more closely by characters of reference,the numeral I0 indicates the existing pipe line which it is desired tocontinue at the dead end II thereof.

For this purpose, I first prepare a pipe member, generally indicated bythe numeral I2, and designated as the T head in the form of a T, saidmember having, in the embodiment shown in Fig. 2, an upwardly extendingtransverse open branch I3, a downwardly extending transverse branch I4,closed as indicated at 33 and 34, the two branches preferably being ofone integral piece of a pipe and obviously being co-axial and identicalin inner diameter, and said T pipe member I2 also showing a longitudinalbranch I5 which may generally serve as a continuation of the main pipeline III when desired.

The upwardly extending branch I3 is threaded internally at its upper endas indicated at I6 and also show outer screw threads I1; such outerthreads to be used for attaching a drilling apparatus, valve, etc. andlater in the sealing of said end externally with a cap if so desired.

In practising my invention, I first secure the T head I2 on the dead endII through its appropriately formed opening I9 fitting on the pipe lineID, as illustrated in Fig. 4, the edges of said opening I9 beingsecurely welded on the outer surface of the main pipe line III, as at20, so as to form a secured and sealed connection therewith. Anappropriate drilling machine, generally indicated by the numeral 2|,many of which are well known in the art and the one I preferably intendto use being known as the Moeller machine, is now secured on the upperend of the branch I3, and through its core drill 22, the dead end II anda portion 23 of the main pipe line I0 within the T head I2 will besevered on the downgoing trip of said core drill 22 and will be upwardlylifted and removed by the return trip thereof through the machine 2|, ina manner well known in the art, the upper transverse branch I3 being allthe time sealed through the well known operation and construction of adrilling machine 2| of the type indicated. It is obvious that instead ofthe horizontal or longitudinal branch I5 of the T a separate pipe I5 maybe employed (Figs. 4 and 5) Welded into the pipe I3, I4 and its possibleinner extension I5a. will also be removed by the core drill.

Through all these operations, the transverse lower branch I4 of said Thead is closed.

When this operation or step is finished, the upper opening of the branchI3 may be taken care of, as by an appropriate plug 35 (Fig. 3), or byany other suitable and desired means.

In Fig. 5, I show the final result of the earlier operations forextending the dead end, plug piece 35 being screwed into the upper endof the branch I3 to seal the same in a temporary or in a final manner,said plug 35 being passed through the machine 2I without permitting theescape of the fluid in the pipe line I0 after the removal of the coredrill, as it will be understood by those versed in this art, the outerthreads N then may be used for a closing cap which is a standardpractise in the pipe industry, to keep out dirt, water, etc. The pipeI3, I4 in practise may be of two pieces I3 and I4 appropriately fittedand welded on the pipes II] and I5, respectively, and to one another, asindicated at 36 in Fig. 5.

The hereinbefore description is to illustrate the practise of myinvention by way of example only, and it is to be understood thatchanges and variations may be made in the constructions, details andsteps thereof, and I hereby reserve all my rights to any and all suchchanges as are within the spirit of the invention and the scope of theappended claim.

Such a change may consist in making the longitudinal or horizontalbranch I5 of the T head as a separate pipe, as indicated in Fig. 4. Itis also understood that the branches. l3 and I4 will have to be oflarger diameter than the main line [0.

Finally, I obviously also may provide a ready T head of my invention forany dead. end of a pipe line when originally installing the 7 same, andwhich will be easily and efficiently ready and available any later timewhen a necessity for the extension of said dead end arises.

In Fig. 4, I illustrated by dotted lines and in a diagrammatic mannerthe connection of the branch I5 of the T head to the new extensionsystem, the connection being indicated by the numeral 31 and thebeginning of the usual extension system by 38.

What I claim as new is:

A method of axially extending a main pipe line under pressure at aclosed or dead end thereof, consisting in securing in a sealed manner atransverse pipe on said main pipe line at said end in such a manner;that said end is within the enclosed space of said transverse pipe, oneend of said transverse pipe being open, while the other end is closed;securing an extension of said main pipe line to said transverse pipe incommunication with the space in said transverse pipe and removing theparts of said main line and said main pipe extension within saidtransverse pipe through the open end thereof, substantial without lossof pressure or fluid.

EMERY DUTCH.

